By [email protected] (John Voelcker) Today, weekend news on the 2018 Nissan Leaf, more on ultra-fast charging from Porsche, carbon capture to come (maybe), and new solar-panel tariffs from Trump. All this and more on Green Car Reports. Over the weekend, as we do every seven days, we ran down last week’s most important green-car stories. We also had two stories on the 2018 Nissan…